USPS Error Detection Numeric Sequence Comparison Questions and Answers 1 — Questions and Answers
Question 1: A sorting manifest lists a package ID as 89347752. The ID scanned from the package barcode is 89437752. How many digits are incorrect in the scanned ID when compared to the manifest?
- One
- Two (Correct answer)
- Three
- Four
Correct answer: Two
Comparing the manifest ID (89347752) to the scanned ID (89437752), the third digit (3 vs. 4) and the fourth digit (4 vs. 3) are different. This is a common transposition error. Therefore, two digits are incorrect.
Question 2: You are verifying a series of tracking numbers against a dispatch log. Which of the following pairs contains an error?
- Log: 45091288 / Scan: 45091288
- Log: 72635491 / Scan: 72635419 (Correct answer)
- Log: 11820034 / Scan: 11820034
- Log: 98765432 / Scan: 98765432
Correct answer: Log: 72635491 / Scan: 72635419
The pair 'Log: 72635491 / Scan: 72635419' contains an error. The seventh and eighth digits are transposed (91 vs. 19). The other three pairs are exact matches.
Question 3: A mail handler is tasked with manually verifying container codes. The code on the container is 91025548. The code in the system is 91025548. What is the correct action?
- Flag the container for a secondary check.
- Mark the codes as a mismatch.
- Mark the codes as a successful match. (Correct answer)
- Request a new code be generated for the container.
Correct answer: Mark the codes as a successful match.
The two numeric sequences, 91025548 and 91025548, are identical. Therefore, the correct action is to confirm they are a successful match and proceed with processing.
Question 4: When comparing the original ZIP+4 code '33186-5001' to the entered code '33186-5010', what type of error has occurred?
- A single-digit substitution (Correct answer)
- A transposition error
- An omission error
- An insertion error
Correct answer: A single-digit substitution
The original code is '...5001' and the entered code is '...5010'. The third digit of the +4 code has been substituted (0 for 1) and the fourth digit has also been substituted (1 for 0). However, the most accurate description for a single digit being changed in place is a substitution. In this case, two substitutions have occurred, but 'single-digit substitution' is the best fit among the choices.
Question 5: An automated reader attempts to scan a tray label ID. It produces four possible readings. The original label ID is confirmed to be 67729015. Which of the following readings is the correct match?
- 67279015
- 67729015 (Correct answer)
- 67729051
- 67729105
Correct answer: 67729015
The reading '67729015' is an exact match to the original label ID '67729015'. The other options contain single-digit errors or transpositions.
Question 6: Compare the following two 8-digit routing numbers: Number 1: 24681357, Number 2: 24681357. Which statement is true?
- Number 2 has a transposition in the last two digits.
- Number 2 is missing a digit.
- The numbers are identical. (Correct answer)
- Number 1 has an error in the fifth digit.
Correct answer: The numbers are identical.
A direct comparison of Number 1 (24681357) and Number 2 (24681357) shows that all digits in all positions are exactly the same. Therefore, the numbers are identical.
USPS Error Detection Numeric Sequence Comparison Questions and Answers 1
A sorting manifest lists a package ID as 89347752.
The ID scanned from the package barcode is 89437752.
How many digits are incorrect in the scanned ID when compared to the manifest?